Brian Park, Skillest CEO · LinkedIn
If you’ve landed here, someone has probably already told you the term. A coach, a YouTube video, or a friend who knows enough golf vocabulary to be dangerous. You’re past “what’s wrong with my swing?” and at “how do I actually fix this?” Good. This article assumes that level of awareness and skips the basics.
TL;DR
Early extension is your body running out of room during the downswing. Your hips and spine move toward the ball instead of rotating around a stable centre. The cause is one of three things: mobility, stability, or pattern. Fix the cause before you try drills. Random drills on the wrong cause make it worse. Realistic timeline: 8–12 weeks of consistent work.
What early extension actually is
The clinical definition: the pelvis moves toward the ball (and the spine straightens) during the downswing instead of rotating around a stable axis. The consequences:
- Your hands run out of room, you stand up to make space, and chicken-wing through impact
- Blocks right or hooks left depending on what compensation you make
- Speed leaks (energy goes vertical instead of into the ball)
- Inconsistent contact. Sometimes thin, sometimes shanky
You can verify it on slow-mo video. Face-on view: at address, draw a vertical line up from your toes. At impact, your hips should still be behind that line. If they’ve moved forward (closer to the ball), that’s early extension.
The three root causes (this is what most articles get wrong)
Most online content jumps to drills. The problem: drills designed for mobility-driven early extension won’t fix stability-driven early extension, and vice versa. Diagnose first.
Quick self-assessment
Test 1. Squat test (mobility):
Stand with feet shoulder-width apart, toes forward. Squat to parallel keeping your heels on the ground. Can you do it? If you can’t, your hip mobility is limiting your rotation. Your body will compensate by moving toward the ball.
Test 2. Hip airplane (stability):
Stand on one leg. Bend forward at the hip until your torso is parallel to the ground (kickstand the other leg out behind). Rotate your torso open to the sky, then back. Can you control the motion? If you wobble badly, your single-leg stability is limiting your ability to hold posture on the downswing.
Test 3. Wall drill (pattern):
Set up to a ball with your butt lightly touching a wall. Take a slow swing. Does your butt stay on the wall through impact? If it leaves the wall on the downswing, you have a swing-pattern issue (your habitual motion is to stand up and chase the ball).
Most golfers fail one of the three tests dominantly. Some fail two. Your dominant failure is your dominant cause.
The fix for each root cause
If your bottleneck is mobility:
Address it off the course. Daily hip mobility work. 90/90 hip rotations, Cossack squats, deep squat holds. For 6–8 weeks. Drills on the range won’t fix what your body can’t do.
If your bottleneck is stability:
Core and glute training. Pallof presses, single-leg deadlifts, glute bridges. Same 6–8 week timeline. The body needs to be able to hold posture before it can rotate within it.
If your bottleneck is pattern:
This is the one drills actually fix. The wall drill (below) is the canonical exercise. 10–15 minutes a day for 4–6 weeks usually rewires the pattern.
Most golfers benefit from working on at least two of these simultaneously. A coach who’s TPI-certified or trained in body-mechanics can program the right combination.
5 drills (organised by root cause)
Drill 1: Wall drill (pattern)
Equipment: a wall. Time: 10 minutes.
- Set up to an imaginary ball with your butt lightly touching a wall (or a couch back).
- Make slow swings. Your butt should stay in contact with the wall through the entire motion.
- If it leaves on the downswing, you’re early-extending. Restart and try again.
- Do 20 slow swings. Add a club after 10 if you’re tracking well.
How to know it’s working: the butt stays on the wall through impact; you feel “stuck in your posture” through the strike.
Drill 2: Chair drill (pattern + mobility)
Equipment: a chair. Time: 10 minutes.
- Set up to an imaginary ball with the front edge of a chair touching your butt.
- Take slow swings. Try to “sit deeper” into the chair through the downswing.
- The chair gives you tactile feedback if you stand up.
How to know it’s working: the chair stays in contact; you feel your hips clearing horizontally instead of vertically.
Drill 3: Resistance band rotation (mobility)
Equipment: a resistance band anchored to a pole. Time: 10 minutes, 3 days/week.
- Anchor a resistance band at chest height.
- Stand sideways to the anchor, grip the band with both hands.
- Rotate your torso away from the anchor against the band’s resistance.
- 3 sets × 10 reps each side.
How to know it’s working: measured trunk rotation increases over 4–6 weeks; you feel more room in your downswing.
Drill 4: Glute bridge + hold (stability)
Equipment: none. Time: 5 minutes, daily.
- Lie on your back, knees bent, feet flat on the floor.
- Press through your heels and lift your hips into a bridge position.
- Hold for 30 seconds, focusing on squeezing the glutes.
- 3 sets.
How to know it’s working: glute strength improves; you feel more stable in your golf posture over 4–6 weeks.
Drill 5: Slow-motion swing with phone video (feedback loop)
Equipment: phone, tripod, club. Time: 15 minutes.
- Set up phone face-on at hip height.
- Make slow-motion swings (50% speed) while recording.
- Watch each swing. Are your hips staying behind the toe line at impact? If not, slow down further and try again.
- Build the correct pattern at slow speed before going to full speed.
How to know it’s working: the video shows your hips staying back through impact; over time, the pattern translates to full-speed swings.
The role of measurement tools
Video analysis tools like Sportsbox AI can measure your early extension in degrees over time. Useful for tracking change. They don’t tell you the cause (mobility vs stability vs pattern), which is the thing that determines which drill or training will help.
Many Skillest coaches use video analysis tools alongside video review. Your coach interprets the data and prescribes the work. That’s the AI-augmented coaching model. It’s the right setup for an early-extension problem because the diagnostic is multi-dimensional.
When to bring in a coach
Early extension is a deep pattern. If you’ve worked through self-tests and drills for 6 weeks and you’re still extending, you’re either misdiagnosing the root cause or you have a compound issue (often mobility + pattern together).
On Skillest, you can filter for coaches who specialise in body-mechanics or TPI work. Many incorporate Sportsbox / HackMotion / similar tools into their lesson. Upload a swing, share any data you have, get a personalised plan within a day or two.
For early-extension specifically, a monthly coaching subscription with a TPI-aware coach is usually higher-ROI than one-off lessons. The work spans both swing changes and off-course training, and a coach can sequence it across weeks.
Try it: browse coaches on Skillest
FAQ
How long does it take to fix early extension?
Realistic: 8–12 weeks of consistent work. Pattern-only fixes can show results in 4–6 weeks; mobility and stability work takes longer because you’re rebuilding physical capacity.
Is early extension the same as “standing up”?
“Standing up” is the visible symptom; early extension is the underlying biomechanical fault. Same thing, different vocabulary.
Can I fix early extension without changing my swing?
Partially. Off-course mobility and stability work changes what your body can do, which changes what your swing can do. Many golfers see immediate improvement from 6 weeks of TPI-style training alone, without changing technique.
Do I need a launch monitor or 3D system to fix it?
No, but they help with tracking progress. A phone for video and a coach’s eye are enough for diagnosis. Measurement tools are most useful for tracking change over time.
Why does early extension cause both shanks AND blocks?
Because the compensation is unpredictable. If you stand up and your hands run out of room, you might chicken-wing (block) or you might dip toward the ball (shank). Same root cause, different downstream symptoms depending on which way you compensated on that swing.
Should I work on early extension or speed first?
Most amateurs should fix early extension first. Speed training compounds whatever pattern you have. Adding speed to an extending swing makes it less consistent, not more. Fix the pattern; then train speed.